There are 12 questions in the exam on
this topic.

NOTE: that
any prefix from pico to giga may be used (in multiples of 103)
in any question or calculation

The
symbols indicates the parts of the syllabus
where maths are involved. Please do not be put off by this as the course
work will help you to fully understand the maths needed for the exam - if
you want to pick up some relatively easy marks
!!